package test0316;

/**
 * @author 兴趣使然黄小黄
 * @version 1.0
 * @date 2023/3/19 9:00
 * 使用两个线程来累加 count 的值
 * 每个线程循环 1w 次，累加变量 count 的值，count 默认值为 0，注意线程安全问题。
 */
@SuppressWarnings({"all"})
public class Main02 {

    static int sum = 10000; // 循环1w次

    static Counter counter = new Counter();

    public static void main(String[] args) throws InterruptedException {
        Thread t1 = new Thread(() -> {
            for (int i = 0; i < sum; i++) {
                counter.increase();
            }
        });
        Thread t2 = new Thread(() -> {
            for (int i = 0; i < sum; i++) {
                counter.increase();
            }
        });

        t1.start();
        t2.start();

        t1.join();
        t2.join();

        System.out.println("和为: " + counter.count);
    }
}


// 用于累加
@SuppressWarnings({"all"})
class Counter {
    public int count = 0;

    public synchronized void increase() {
        count++;
    }
}
